Do you mean to allow VPN access? For PPTP you only need tcp port 1723 .
If your VPN server is using a private IP behind the router, you forward tcp
port 1723 from the router to the server's private IP . The remote client
then connects to the router's public IP . The VPN traffic is forwarded
through the LAN to the VPN server, in the same way that you can forward port
80 to a web server.
In addition, the router must not block GRE. Generic Routing
Encapsulation is IP protocol 47. The VPN data packets packets have GRE
headers, so your connection will fail if your router (or anything else in
the path) blocks GRE. PPTP just sets up and maintains the VPN tunnel. If GRE
is blocked the tunnel exists, but nothing uses it. You usually get a 721
error in this case.
<(E-Mail Removed)> wrote in message
news:1dc9601c45468$4fd6ddb0$(E-Mail Removed)...
> What ports do I configure on adsl routers ? Is this both
> routers ? Any other settings ? Is there any simple tests
> I can perform to debug the problem ?
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